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Entry  11 Feb 2014, Randolf Pohl, Forum, Huge events (>10MB) every second or so 
    Reply  11 Feb 2014, Stefan Ritt, Forum, Huge events (>10MB) every second or so 
    Reply  18 Feb 2014, Konstantin Olchanski, Forum, Huge events (>10MB) every second or so 
    Reply  01 Mar 2014, Randolf Pohl, Forum, Huge events (>10MB) every second or so big_event.tgz
       Reply  01 Mar 2014, Stefan Ritt, Forum, Huge events (>10MB) every second or so 
Message ID: 956     Entry time: 11 Feb 2014     Reply to this: 957   962   975
Author: Randolf Pohl 
Topic: Forum 
Subject: Huge events (>10MB) every second or so 
I'm looking into using MIDAS for an experiment that creates one large event
(20MB or more) every second.

Q1: It looks like I should use EQ_FRAGMENTED. Has this feature been in use
recently? Is it known to work/not work?

More specifically, the computer should initiate a 1 second data taking, start to
such the data out of the electronics (which may take a while), change some
experimental parameters, and start over. 

Q2: What's the best way to do this? EQ_PERIODIC? 
I cannot guarantee that the time required to read the hardware has an upper bound.
In a standalone-prog I would simply use a big loop and let the machine execute
it as fast as it can: 1.1s, 1.5s, 1.1s, 1.3s, 2.5s, ..... depending on the HW
deadtimes.
Will this work with EQ_PERIODIC?

(Sorry for these maybe stupid questions, but I have so far only used MIDAS for
externally generated events, with <32kB event size).


Thanks a lot,

Randolf
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